CVE-2024-36962net: ks8851: Queue RX packets in IRQ handler instead of disabling BHs
- 7.5HighCVSS base score
- 0.46%Exploitation in 30 daysEPSS · top 59% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: net: ks8851: Queue RX packets in IRQ handler instead of disabling BHs Currently the driver uses local_bh_disable()/local_bh_enable() in its IRQ handler to avoid triggering net_rx_action() softirq on exit from netif_rx(). The net_rx_action() could trigger this driver .start_xmit callback, which is protected by the same lock as the IRQ handler, so calling the .start_xmit from netif_rx() from the IRQ handler critical section protected by the lock could lead to an attempt to claim the already claimed lock, and a hang. The local_bh_disable()/local_bh_enable() approach works only in case the IRQ handler is protected by a spinlock, but does not work if the IRQ handler is protected by mutex, i.e. this works for KS8851 with Parallel bus interface, but not for KS8851 with SPI bus interface. Remove the BH manipulation and instead of calling netif_rx() inside the IRQ handler code protected by the lock, queue all the received SKBs in the IRQ handler into a queue first, and once the IRQ handler exits the critical section protected by the lock, dequeue all the queued SKBs and push them all into netif_rx(). At this point, it is safe to trigger the net_rx_action() softirq, since the netif_rx() call is outside of the lock that protects the IRQ handler.
Timeline
ID reserved
By Linux
- 4 days later
· 4 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.46% · top 59% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 492337a4fbd1421b42df684ee9b34be2a2722540 – < 8a3ff43dcbab7c96f9e8cf2bd1049ab8d6e59545
- affected cba376eb036c2c20077b41d47b317d8218fe754f – < ae87f661f3c1a3134a7ed86ab69bf9f12af88993
- affected 49d5d70538b6b8f2a3f8f1ac30c1f921d4a0929b – < 7e2901a2a9195da76111f351584bf77552a038f0
- affected be0384bf599cf1eb8d337517feeb732d71f75a6f – < e0863634bf9f7cf36291ebb5bfa2d16632f79c49
- affected 6.1.87 – < 6.1.91
- affected 6.6.28 – < 6.6.31
- affected 6.8.7 – < 6.8.10
References
References4
- https://git.kernel.org/stable/c/8a3ff43dcbab7c96f9e8cf2bd1049ab8d6e59545 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ae87f661f3c1a3134a7ed86ab69bf9f12af88993 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7e2901a2a9195da76111f351584bf77552a038f0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e0863634bf9f7cf36291ebb5bfa2d16632f79c49 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-36312 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-36962)Record last updated .